DNS Server Upgrades

Today I have improved the resilience of our DNS services by upgrading both the primary (London) and secondary (New York) DNS servers to the latest versions. We can now fully support both IPV4 and IPV6 network addresses and name resolution within the same domain structure.

These servers both have our innovative adaptive firewall technology that constantly monitors activity for abnormal behaviour and shuts down connections to the offending party before it becomes an issue.

They’re also monitored 24/7, like all our other servers, to ensure that we maintain our 99.999% up-time record.

SaaS, PaaS, IaaS etc… What are they?

You’ve probably been seeing these acronyms in the business and IT media for the past few years; but what are they and what do they mean to you? I’ve seen lots of different definitions over the years, some right and some wrong. Let’s start by stating what the acronyms actually stand for…

  • SaaS – Software as a Service
  • PaaS – Platform as a Service
  • DaaS – Data as a Service
  • BaaS – Backend as a Service
  • IaaS – Infrastructure as a Service

Just about everyone understands what software is these days, it’s the applications you install and run on your computer, laptop, tablet, smartphone etc. SaaS is software provided to you as a service, you may have seen Google Apps, Microsoft Office 365 or Adobe Creative Cloud. They’re mainstream office software that’s provided as a service, you subscribe for £x.xx per month and get the latest version to run on your computing devices. Our virtco.com webmail and email service would also be described as a SaaS product.

PaaS, or Platform as a Service is a bit more abstract for the business person or end user, but put simply a platform would be something like a web server, or a set of application platform interfaces like the PayPal payment gateway system. Our virtco.com web hosting product provides our primary PaaS offering, and we are also about to launch a private cloud storage product within the virtco.com portfolio.

DaaS, or Data as a Service is the provision of database services, such as a SQL server. Our DaaS product offering from virtco.com is based around the MySQL database and is replicated across the network to provide high availability and resilience.

BaaS, or Backend as a Service is the provision of behind the scenes services to web and mobile application developers to enable integration of the other as-a-service concepts.

IaaS, or Infrastructure as a Service is the provision of the infrastructure to run all the other as-a-service layers on, so it’s the backend server hardware, network infrastructure, mobile phone networks, wireless networks etc that your equipment needs to communicate on and with.

I would like to introduce you to a new concept that D Grant Crawley Ltd has been working on, and that’s CaaS or Compute as a Service. The concept of CaaS is to provide all your business computing needs as a service. That’s everything from desktop pcs, laptops, tablets, software, Internet connectivity, website, email, cloud storage, cloud servers and all the infrastructure in-between that enables it all to work seamlessly and reliably.


The advantage to businesses is that it allows them to budget their IT spend accurately, by only paying for what they use. Giving the ability to scale up and down as required. CaaS also provides businesses a ready-made best-practice driven IT environment which ensures that systems are always up-to-date. The concept is to align the services provided to the business strategy, enabling the business to forge ahead without having to worry about whether their IT systems will cope.

Computer Hardware

Supply of computer hardware is not really as simple as just going down to PC World and buying something off the shelf if you really want to get some work done. It needs to be an integral part of your business IT strategy so you can keep control of the hardware you operate. As a result, our customers have come to us for years to specify, recommend and procure their mobile, desktop, laptop and server hardware for them. We take everything into account, including the initial budget, ongoing support costs, and future expansion of your business.

Network Infrastructure

DGC Ltd have been installing computer networks since the days of Thick and Thin Ethernet, a coaxial based network ring topology. The networking world has moved on considerably, and we now use the latest technologies and fit the best possible solution for your business. Whether that’s CAT6 structured cabling, fibre optic links, microwave point-to-point bridges, or even laser line-of-sight systems.

No project is too small or too big for us, we can pull in resources as required to ensure that your project is delivered on time and within budget.